Welding machine



Feb. 18, 1936. E. J. voN HENKE WELDING MACHINE Filed Feb. 5, 1934 3 Sheets-Sheet 1 v/EN// Y BY l d 7a ATToRNErwE f Feb. 18, 1936. E. J. voN HENKE WELDING MACHINE Filed Feb. 5,

1934 3 Sheets-Sheet 2 I 111 1111 lll,

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f l j INVENTOR Feb. 18, 1936. E. J. voN HENKE 2,031,082

WELDI NG MACHINE Filed Feb. 5, 19:54 s sheets-shea s INVENTOR ATTORNEYS.

Patented Feb. 18, 1936 PATENT OFFICE WELDING MACHINE Edmund J. von Henke,

American Electric Fusion Corporation, Chicago,

Chicago, Ill., assignor to Ill., a corporation of Illinois Application February 5, 1934, Serial No. 709,679

6 Claims.

This invention relates to a novel and improved form of welding machine, the novel features of which will be better understood by reference to the accompanying drawings in which I have shown selected embodiments of the various novel features, and in which:

Fig. 1 isa vertical sectional view throughy a machine constructed according to my invention;

. Fig. 2 is a view of the upper part of Fig. l, taken from the right of that figure;

Fig. 3 is a section approximately on the line 3-3 of Fig. 1; f

Fig. 4 is a side elevation of a machine likewise embodying the invention and equipped for continuous operation;

Fig. 5 is a view, partly in elevation and'partly in section, showing the head of the casing as viewed from ,the left of Fig. 1 and with all other parts omitted;

Fig. 6 is a section on the line 6-6 of Fig. 3;

Fig. '7 is a fragmentary view showing part of be readily combined with the base and head to form the completed casing. The parts may be held together by vertically extending tie-bolts. 3, as plainly indicated in Fig. 1.

The head 2, as best shown in Fig. 2, has spaced bearings 4 in which is supported a transversely extending pivot pin 5. In the form shown, this pin is fixed in position in the bearings l, and pivotally mounted thereon is a rocker arm 6 having a bore 1 in which is received the horn 5 of an electrode 9. This horn may be clamped in the bore as by a bolt I0. The rocker arm is preferably supported on the pivot by downwardly extending legs II, between which is received a socket piece I2 likewise pivoted on the pin 5 and having a socket within which is received the horn 8 which may be clamped in the socket by the bolt I9, it being understood that this socket is split for that purpose.

Likewise mounted upon the pivot pin 5 is a bracket Il having opposite legs I5 pivotally receiving the pin 5 on the outside of the legs Il, as plainly shown in Fig. g, Ig'he legs I5 are suitably insulatedfrom other metal parts by the bushings I6.

The bracket I4 has depending therefrom a swivel post I1 having on its lower end an insu lating bushing I8, and this post is received against a bearing I9 on the lower part of the head. The front plate of the casing is recessed at 2| so that the post will not contact therewith.

Slidably mounted on the post I1 is a socket piece 22 which may be clamped in xed position on the post by means of a bolt 23 and which like- Wise has a socket receiving the horn 2l which supports the electrode 25. The horn may be clamped in the socket piece by a bolt 25, and it is of course understood that the electrodes may be held in place in the horns by means `of `the bolts or other locking means 21.

The arrangement just described is one in, Y which it will be seen that the lower electrode 25 is held in position to cooperate with the upper electrode 9 by a very simple arrangement. The one pivot pin serves to support the rocker arm an'd the bracket for the lower electrode as well. The weight ofthe electrode 25, the horn 2l, and the socket piece 22, as well as the weight ofthe swivel post itself and the bracket on which it is mounted, will tend to cause rotation of* all these parts about the pivot 5 in a clockwise direction, as viewed in Fig. 1, it being seen that substantially all of these parts are disposed forwardly of a vertical plane through the axis of that pivot. By this arrangement, the parts just enumerated are easily mounted and held in position without complicated fastening means. Other advantages will also be apparent to those skilled in the art.

Depending from the top 28 of the head is a wall 29 having an opening 30 therein, and this wall terminates in a horizontally extending shelf 3l which is connected to the face 32 of the head. It is on this facel 32 that the bearing I9 is located. On the rear of the wall 29 is a shelf 33 to support the primary 3l of a transformer. The transformer may be held against the wall by a clamping frame 95 held to the wall by bolts 3i. Likewise depending from the wall 29 is a projection 31 to support the conductor 38, by means of which current may be conducted to the transformer.

The transformer may also include a secondary, the opposite ends 39 and lll of which are connected, respectively, to the'socket piece I2 and the bracket Il. 'Ihe socket piece I2 is provided with a lug 4| `withzwhich the end 39 of the secondary may contact and to which it may be bolted as indicated. The end 40 may likewise be bolted directly to the bracket I4, as shown in Fig. 1.

The rocker arm 6 may be moved upon the pivot pin 5, and normally the bracket I4 will be stationary on that pivot, although capable of movement in a counterclockwise direction thereon, as viewed in Fig. 1. The movement of the rocker arm is for the purpose of bringing the electrode 9 into and out of operative relation to the electrode 25, and this may be done by a vertically extending connecting member 42 extending through the head 2 and into the interior of the casing. There it is connected to a switch operating mechanism indicated generally by the numeral 43. The details of this mechanism may be the same as those in my prior Patent 1,843,937, and therefore a further detailed description thereof will not be given. This switch mechanism is designed to control passage of current through the conductor 38 to the transformer and is operated by means of a ytreadle 44 passing through an eye-bolt 45, which in turn may be pivoted in the eye 46 disposed at one end of a treadle 'arm 41. This arm is rotatably mounted upon a pivot pin'48 and has its opposite end pivotally secured at 49 to the lower end of the connecting member 42. comprise several separate elements connected together, but for the purpose of this application, these elements may be considered as one member.

The pivot pin 48 is supported in a pair of spaced upwardly extending lugs 50, one at each end of the bearing 5I of the treadle arm, and may be held in these lugs as by U-bolts 52. treadle 44 may be swung horizontally to diil'erent positions by means of the pivotal connection previously. described, and may be held in selected position by engagement ofa tooth 53 engaging .A with teeth 54 on the treadle arm.

In operation, the treadle may be depressed to close the switch, which in turn controls the ow of current to the primary of the transformer, and also to bring the electrodes 9 and 25 into operative relation with each other and the work which is held therebetween in any suitable manner. Current will flow through the horns and electrodes and through the work between the electrodes, all in a manner well known in the art. This current is rendered more effective by the use of the socket piece I2 which may be made 0i' copper or other material of high conductivity. In other words, the rocker arm 6 is one which requires structural strength in order to operate the horn 8 and electrode 9 carried thereby and therefore shouldbe made of some metal which is strong enough to perform this function without undue danger of brealgge. For example; if the arm 6 is made of cast iron or`cast steel, the conductivity of that metal is not as good as copper which, A, on the other hand, is not as good a structural material as the other metals men- `tioned. The socket piece I2, however, provides a sufilcient conductivity independently of the support and structural strength furnished by the rocker arm B. On the other hand, the bracket I4 is so located that it does not require the same structural strength as the rocker arm 6 does, and this may be made of suitable conductive material, such as copper, as may also the socket piece 22. The horns 8 and 24 are of conductive material, as well known in the art.

Referring to Fig. 4, the structure shown therein is essentially thelsame as that which has been described above, but here, instead of the mechanismbeing operated by the treadle, the treadle 44 may be used to control the operation of a motorwhich causes the electrodes 9 and 25 This connecting member may The to be brought together at regular intervals. The motor operates suitable mechanism known in the art which will achieve this purpose, and since that mechanism is well known, no further description thereof is given here.

Referring now to Fig. 7, I have shown therein certain parts appearing in Fig. 1, but in diierent positions. For example, in this figure the socket piece I2 has been o-mitted, as may be done if the material of the rocker arm 6 is of suiliciently good conductivity to supply current to the electrode carried by the horn 8. The swivel post I1 carries the socket piece 22, but in this instance this socket piece is reversed from the position occupied by Vit in Fig. 1 and has likewise been j moved to a point adjacent the bottom of the post. This will indicate the exibility of the arrangement disclosed herein.

While I have shown the invention as `embodied in specic forms, it is to be understood that various changes in details may be made without departing from the scope of the invention, and I therefore do not intend to limit myself except by the appended claims.

I claim:

1. In a welding machine, a base having a support extending upwardly therefrom, a horizontally extendingpin mounted on said support, two members both pivotally mounted on said pin, one

extending upwardly and the other downwardly therefrom and one resting against said support to prevent rotation on the pivot in one direction, horns mounted in said members, and electrodes mounted in said horns and facing towards each other whereby upon pivotal movement of said members with respect to each other said electrodes may be brought into close proximity to weld work therebetween, and means for supplying electric current to said electrodes.

2. In a welding machine, a horizontally extending pin, a bracket suspended on said pin, a horn .supported on said bracket and extending outwardly therefrom, an electrode on said horn, the center of gravity of said bracket and parts carried thereby` being located onA one side of a vertical plane through the axis of said pin to thereby create a tendency to rotate on said pin, and a bearing on the machine preventing such rotation.

3. In a welding machine, a horizontally extending pin, a bracket suspended on said pin, a

downwardly extending post on said bracket, a socket piece slidably mounted on said post, a horn supported-in said socket piece and in turn supporting an electrode, the axis of said post being located eccentrically to the axis of the pin, and

a bearing on the machine engaging said post to prevent rotation around said pin because of said eccentricity.

4. In a welding machine, a horlzontallyextending pin, a bracket suspended on said pin, a downwardly extending post on said bracket, a socket piece extending lengthwise of and slidably mounted on said post, and a horn carrying an electrode and supported in said socket piece adjacent oneend thereof, whereby reversal of the socket piece on the post will change the position of the electrode.

- 5. In a welding machine, a casing having a head provided with a face forming part of the front of the casing, said face comprising a vertically extending wall set back from thefront of the casing below it and having an opening ytherein, a transformer mounted on said wall and having a secondary with ends extending through said pening, two electrodes connected to the opposite nds of said secondary and mounted on members ivoted on said head in iront of said opening Ior ivotal motion with respect to each other, means :lr causing said, pivotal motion, and means i'or upplying currentto said transformer.

6. In a. welding machine, a casing having a lead with an opening through a vertically exending wall thereof. a horizontally extending in mounted on said head outside said casing and adjacent said opening, a transformer supported on said head within said casing, two electrodes pivotally mounted upon said pin, connections from the secondary of said transformer to said electrodesand extending through said opening,

EDMUND J. VON HENKE. 10 

